Guangxi Longlin is the mountainous county producing the most chestnuts. The main producing areas are Shali, Kele, Pingya and Xinzhou. The annual output is 500 tons. Every year, the chestnut mature season, foreign merchants flock to Longlin to buy chestnut. One hundred tons of chestnuts are sold all over the county in one month, which is one of the pillars of economic forests and rich people. Chestnut is a highly nutritious food, such as making Sichuan cakes and dumplings are essential ingredients. Modern science found that the carotene content of chestnut is four times that of peanuts, and the vitamin C content is 18 times that of peanuts. It has a good effect of preventing cancer, lowering cholesterol, preventing blood clots and invading viruses and bacteria.

In recent years, Longlin County regards chestnut production as a superior characteristic agriculture, and promotes the efficiency of agriculture and the increase of farmers' income. The project is focused on policy, capital and technology, and the production of low-yield chestnut is vigorously implemented. Renovation, grafting of improved varieties, establishment of demonstration base for chestnut production, active promotion of new technologies such as integrated pest control, chestnut formula fertilization, and promotion of chestnut production to scale and industrialization. Longlin County Autonomous County makes full use of mountain resources, combines returning farmland to forests, and follows the development idea of ​​“one reservoir and two seas” to do a good job on mountain articles, actively introduce fine varieties, vigorously develop chestnut planting, and graft the original chestnuts. We will increase the intensity of variety improvement, strive to increase the yield and quality of chestnuts, increase the income of fruit farmers, and let farmers taste the sweetness and get benefits. At present, the county has an area of ​​150,000 mu of chestnut. At present, 60,000 mu has entered a prolific period, with an annual output of more than 12,000 tons of fresh fruit, calculated at 4,000 yuan per ton, with an output value of 48 million yuan. Longlin chestnut has good quality, good taste and high nutritional value. It has always been known as the “hometown of chestnut”. Every year on National Day and around August 15th, merchants from Hubei, Hunan, Guangdong, Guizhou and other places have come to Shali Township in the county and Zhentoutang in Xinzhou to purchase chestnuts. At the time of the chestnut harvest, the fruit farmers are busy collecting and selling chestnuts, and nearly 100 tons of chestnuts are sold to the inside and outside every day.

Longlin chestnut quality technical requirements First, the variety of Longlin local high-quality oil chestnut, chestnut varieties. Second, the site conditions are most suitable for slightly acidic soils. 3. Cultivation 1. Seedling: Seeds of seedlings should be selected from high-yield, high-quality (7 to 13 years old) seedlings for cultivation; grafted seedlings should be selected as rootstocks for selection of high-yield, high-quality parent tree canopy The middle and upper parts are strong and full, the buds are full of growing branches or the resulting mother branches are used for scioning. 2. Planting: 40 to 60 plants (4 × 4 m) are planted on the sloping slopes of the soil, and the soil is fertile and profoundly planted in 20 to 40 plants (5 × 5 m). 3. Fertilization: 50 kg of organic fertilizer per plant per year. Fourth, harvesting harvest time harvesting index oil chestnut September-October capping cracking up to 50% more hairy September-October capping cracking up to 50% or more five, quality characteristics, physical and chemical, grade indicators 1. Sensory features: 1 oil chestnut fruit shape oval, neat and full, peel purple brown or auburn, thin and smooth skin, shiny, less hair, pale yellow; 2 chestnut fruit shape is flat oval, thin skin with hairy, peel Reddish brown or tan, fleshy yellow. 2. Grade index: The index of Maoli and oil chestnuts should meet the requirements of Table 1. Table 1 Grade index grade Item Kilogram Number of defects Permissible tolerance Superior grades of chestnut fruit evenly, 80-120 grains per kilogram without mold, no insects No impurities. Air-dried and cracked fruit are not more than 2% of oil chestnut fruit evenly. Each kilogram of 90-130 tablets of first-class chestnut fruit is evenly distributed. Each kilogram of 121-145 grains has no mold, no insects, no impurities. Air-dried and cracked fruit are not more than 6%. The chestnut fruit is evenly distributed. Each kilogram of 131-160 tablets of qualified chestnut fruit is even, with 146-167 grains per kilogram without impurities, mold, insects, air drying and cracking. The mouth of the four items is not more than 8%. The oil chestnut fruit is evenly distributed. 161-190 tablets per kilogram. Note: The number of kilograms is not applicable to small fruit varieties. 3. Physical and chemical indicators: The physical and chemical indicators of Maoli and oil chestnuts should meet the requirements of Table 2. . Table 2 Physical and chemical indicators Project indicators Maoli oil chestnut water (g / 100g) 45 ~ 5242-50 Protein (g / 100g) ≥ 3.02.8 Starch (g / 100g) 25 ~ 4030 ~ 45 Calcium (mg / kg) ≥ 130128 Fat (g/100g) 0.4～3.00.6～3.2 Amino acid (g/100g)≥ 2.52.3 VI. Hygienic requirements The sanitary standards of the chestnut and the oil chestnut are implemented in accordance with relevant national standards or regulations. VII. Safety and other quality technical requirements Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
Producers within the production area of ​​Longlin Chestnut can apply to the Quality and Technical Supervision Bureau of the Longling County Autonomous County of Baise City, Guangxi Zhuang Autonomous Region for the use of the “Special Mark for Geographical Indication Products”, which has been reviewed by the Quality and Technical Supervision Bureau of Guangxi Zhuang Autonomous Region. Announced after approval by the General Administration of Inspection and Quarantine. The detection mechanism of Longlin chestnut is selected by the Quality and Technical Supervision Bureau of Guangxi Zhuang Autonomous Region in the inspection institutions that meet the qualification requirements.